[LargeFormat] Confused Uncle Seeks Truth

[Jim Brick]

Unk,

Enhancing filters. Tiffen, B+W, HiTech, etc. I have and use B+W and Tiffen. 
I also have some from the inventor of the "didymium" filter, Howard G. 
Ross. See:

http://medfmt.8k.com/mf/filters.html

These filters have roughly a 1/2 stop correction factor. My Tiffens & B+Ws 
are 1.4, my didymiums are 1.8 .

Under the right circumstances, these filters can give an outstanding 
effect. And you cannot look through them to determine what the film will 
see. Experience is the only way. Each manufacturer has a different quality. 
my B+W's are different from my Tiffen's, both of which are w-a-y different 
from my didymium's.

Jim




At 09:29 AM 5/4/2003 +0800, rstein wrote:
>Dear Friends,
>
>      Uncle Dick has been reading about soemthing called a Redhancer filter.
>Apparently this will boost up the red tones in a colour picture while
>leaving the other colours unaffected. A special glass, I believe.
>
>      I am intrigued. I need guidance before I spend my own money. ( If I am
>spending someone else's money I can do it freehand - this is a principle
>very popular with the government....)
>
>     1.    Does it really work?
>
>     2.     Does it work in red only or does it extend to orange and yellow?
>
>     3.     How much of a boost is there?
>
>     4.     Is it an effect that is dependant upon the angle of the sun or
>rotation of the filter like a polarising filter?
>
>     5.    Does it affect red tones in a negative and a transparency film
>equally?
>
>     6.     Can your eye see these changes in the red tones when you look
>through the filter at the scene that you want to photograph?
>
>     7.    Is there an exposure increase needed?
>
>     8.     Is there a similar filter that works on other colours? ie blue or
>green.
>
>      I hope someone in the landscape line has had some experience with one
>of these and can report. Many thanks for the help.
>
>      Uncle Dick
>
>
>
>
>
>
>
>
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